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//==========================================================================

//

//      network_support.c

//

//      Misc network support functions

//

//==========================================================================

//####ECOSGPLCOPYRIGHTBEGIN####

// -------------------------------------------

// This file is part of eCos, the Embedded Configurable Operating System.

// Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.

// Copyright (C) 2003 Andrew Lunn <andrew.lunn@ascom.ch>   

//

// eCos is free software; you can redistribute it and/or modify it under

// the terms of the GNU General Public License as published by the Free

// Software Foundation; either version 2 or (at your option) any later version.

//

// eCos is distributed in the hope that it will be useful, but WITHOUT ANY

// WARRANTY; without even the implied warranty of MERCHANTABILITY or

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

// for more details.

//

// You should have received a copy of the GNU General Public License along

// with eCos; if not, write to the Free Software Foundation, Inc.,

// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

//

// As a special exception, if other files instantiate templates or use macros

// or inline functions from this file, or you compile this file and link it

// with other works to produce a work based on this file, this file does not

// by itself cause the resulting work to be covered by the GNU General Public

// License. However the source code for this file must still be made available

// in accordance with section (3) of the GNU General Public License.

//

// This exception does not invalidate any other reasons why a work based on

// this file might be covered by the GNU General Public License.

//

// Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.

// at http://sources.redhat.com/ecos/ecos-license/

// -------------------------------------------

//####ECOSGPLCOPYRIGHTEND####

//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):    gthomas

// Contributors: gthomas, sorin@netappi.com ("Sorin Babeanu"), hmt, jlarmour,

//               andrew.lunn@ascom.ch

// Date:         2000-01-10

// Purpose:      

// Description:  

//              

//

//####DESCRIPTIONEND####

//

//==========================================================================

// BOOTP support

#include <pkgconf/net.h>

#undef _KERNEL

#include <sys/param.h>

#include <sys/socket.h>

#include <sys/ioctl.h>

#include <sys/errno.h>

#include <net/if.h>

#include <netinet/in.h>

#include <netinet/ip.h>

#include <netinet/ip_icmp.h>

#include <net/route.h>

#include <cyg/infra/diag.h>

#include <cyg/kernel/kapi.h>

#include <stdio.h>    // for 'sprintf()'

#include <bootp.h>

#include <network.h>

#include <arpa/inet.h>

#ifdef CYGPKG_IO_PCMCIA

#include <cyg/io/eth/netdev.h>

#endif

#ifdef CYGPKG_NET_DHCP

#include <dhcp.h>

#endif

#ifdef CYGPKG_NS_DNS

#include <pkgconf/ns_dns.h>

#endif

#ifdef CYGHWR_NET_DRIVER_ETH0

struct bootp eth0_bootp_data;

cyg_bool_t   eth0_up = false;

const char  *eth0_name = "eth0";

#endif

#ifdef CYGHWR_NET_DRIVER_ETH1

struct bootp eth1_bootp_data;

cyg_bool_t   eth1_up = false;

const char  *eth1_name = "eth1";

#endif

#define _string(s) #s

#define string(s) _string(s)

#ifndef CYGPKG_LIBC_STDIO

#define perror(s) diag_printf(#s ": %s\n", strerror(errno))

#endif

#ifdef CYGPKG_NET_NLOOP

#if 0 < CYGPKG_NET_NLOOP

//  

//   Initialize loopback interface  ----------   Added by sorin@netappi.com 

//

cyg_bool_t init_loopback_interface(int lo)

{

    struct sockaddr_in *addrp;

    struct ifreq ifr;

    int s;

    int one = 1;

    struct ecos_rtentry route;

    struct in_addr netmask, gateway;

    s = socket(AF_INET, SOCK_DGRAM, 0);

    if (s < 0) {

        perror("socket");

        return false;

    }

    if (setsockopt(s, SOL_SOCKET, SO_BROADCAST, &one, sizeof(one))) {

        perror("setsockopt");

        return false;

    }

    addrp = (struct sockaddr_in *) &ifr.ifr_addr;

    memset(addrp, 0, sizeof(*addrp));

    addrp->sin_family = AF_INET;

    addrp->sin_len = sizeof(*addrp);

    addrp->sin_port = 0;

    // Make an address 127.0.<lo>.1 to manage multiple loopback ifs.

    // (There is normally only 1, so it's the standard 127.0.0.1)

    addrp->sin_addr.s_addr = htonl((0x100 * lo) + INADDR_LOOPBACK) ;

#if CYGPKG_NET_NLOOP > 1

    // Init the one we were told to

    sprintf(ifr.ifr_name, "lo%d", lo);

#else

    strcpy(ifr.ifr_name, "lo0");

#endif    

    if (ioctl(s, SIOCSIFADDR, &ifr)) {

        perror("SIOCIFADDR");

        return false;

    }

#if 1 < CYGPKG_NET_NLOOP

    // We cheat to make different nets for multiple loopback devs

    addrp->sin_addr.s_addr = netmask.s_addr = htonl(IN_CLASSC_NET);

#else

    // 

    addrp->sin_addr.s_addr = netmask.s_addr = htonl(IN_CLASSA_NET);

#endif

    if (ioctl(s, SIOCSIFNETMASK, &ifr)) {

        perror("SIOCSIFNETMASK");

        return false;

    }

    ifr.ifr_flags = IFF_UP | IFF_BROADCAST | IFF_RUNNING;

    if (ioctl(s, SIOCSIFFLAGS, &ifr)) {

        perror("SIOCSIFFLAGS");

        return false;

    }

    gateway.s_addr = htonl(INADDR_LOOPBACK);

    memset(&route, 0, sizeof(route));

    addrp->sin_family = AF_INET;

    addrp->sin_len = sizeof(*addrp);

    addrp->sin_port = 0;

    addrp->sin_addr.s_addr = htonl((0x100 * lo) + INADDR_LOOPBACK) & netmask.s_addr;

    memcpy(&route.rt_dst, addrp, sizeof(*addrp));

    addrp->sin_addr = netmask;

    memcpy(&route.rt_genmask, addrp, sizeof(*addrp));

    addrp->sin_addr = gateway;

    memcpy(&route.rt_gateway, addrp, sizeof(*addrp));

    route.rt_dev = ifr.ifr_name;

    route.rt_flags = RTF_UP|RTF_GATEWAY;

    route.rt_metric = 0;

    if (ioctl(s, SIOCADDRT, &route)) {

        diag_printf("Route - dst: %s", inet_ntoa(((struct sockaddr_in *)&route.rt_dst)->sin_addr));

        diag_printf(", mask: %s", inet_ntoa(((struct sockaddr_in *)&route.rt_genmask)->sin_addr));

        diag_printf(", gateway: %s\n", inet_ntoa(((struct sockaddr_in *)&route.rt_gateway)->sin_addr));

        if (errno != EEXIST) {

            perror("SIOCADDRT 3");

            return false;

        }

    }

    close(s);

    return true;

}

#endif

#endif

//

// Internal function which builds up a fake BOOTP database for

// an interface.

//

static unsigned char *

add_tag(unsigned char *vp,

        unsigned char tag,

        void *val,

        int len)

{

    int i;

    unsigned char *xp = (unsigned char *)val;

    *vp++ = tag;

    *vp++ = len;

    for (i = 0;  i < len;  i++) {

        *vp++ = *xp++;

    }

    return vp;

}

void

build_bootp_record(struct bootp *bp,

                   const char *if_name,

                   const char *addrs_ip,

                   const char *addrs_netmask,

                   const char *addrs_broadcast,

                   const char *addrs_gateway,

                   const char *addrs_server)

{

    int i, s;

    in_addr_t addr;

    unsigned char *vp;

    unsigned char cookie[] = VM_RFC1048;

    struct ifreq ifr;

    bzero(bp, sizeof(struct bootp));

    bp->bp_op = BOOTREPLY;

    bp->bp_htype = HTYPE_ETHERNET;

    bp->bp_hlen = 6;

    // Query the hardware address

    for (i = 0;  i < bp->bp_hlen;  i++) {

        bp->bp_chaddr[i] = 0xFF;  // Unknown

    }

    s = socket(AF_INET, SOCK_DGRAM, 0);

    if (s >= 0) {

        strcpy(ifr.ifr_name, if_name);

        if (ioctl(s, SIOCGIFHWADDR, &ifr) >= 0) {

            bcopy(ifr.ifr_hwaddr.sa_data, bp->bp_chaddr, bp->bp_hlen);

        }

        close(s);

    }

    // Fill in the provided IP addresses

    bp->bp_ciaddr.s_addr = inet_addr(addrs_ip);

    bp->bp_yiaddr.s_addr = inet_addr(addrs_ip);

    bp->bp_siaddr.s_addr = inet_addr(addrs_server);

    bp->bp_giaddr.s_addr = inet_addr(addrs_gateway);

    vp = &bp->bp_vend[0];

    bcopy(&cookie, vp, sizeof(cookie));

    vp += sizeof(cookie);

    addr = inet_addr(addrs_netmask);

    vp = add_tag(vp, TAG_SUBNET_MASK, &addr, sizeof(in_addr_t));

    addr = inet_addr(addrs_broadcast);

    vp = add_tag(vp, TAG_IP_BROADCAST, &addr, sizeof(in_addr_t));

    addr = inet_addr(addrs_gateway);

    vp = add_tag(vp, TAG_GATEWAY, &addr, sizeof(in_addr_t));

    *vp = TAG_END;

}

//

// Initialize network interface[s] using BOOTP/DHCP

//

void

init_all_network_interfaces(void)

{

    static volatile int in_init_all_network_interfaces = 0;

#ifdef CYGPKG_IO_PCMCIA

    cyg_netdevtab_entry_t *t;

#endif // CYGPKG_IO_PCMCIA

    cyg_scheduler_lock();

    while ( in_init_all_network_interfaces ) {

        // Another thread is doing this...

        cyg_scheduler_unlock();

        cyg_thread_delay( 10 );

        cyg_scheduler_lock();

    }

    in_init_all_network_interfaces = 1;

    cyg_scheduler_unlock();

#ifdef CYGHWR_NET_DRIVER_ETH0

    if ( ! eth0_up ) { // Make this call idempotent

#ifdef CYGPKG_IO_PCMCIA

        if ((t = eth_drv_netdev("eth0")) != (cyg_netdevtab_entry_t *)NULL) {

            int tries = 0;

            while (t->status != CYG_NETDEVTAB_STATUS_AVAIL) {

                if (tries == 0) {

                    diag_printf("... Waiting for PCMCIA device 'eth0'\n");

                }

                if (++tries == 5) {

                    diag_printf("... Giving up on PCMCIA device 'eth0'\n");

                    goto bail_eth0;

                }

                cyg_thread_delay(100);

            }

        }

#endif // CYGPKG_IO_PCMCIA

#ifdef CYGHWR_NET_DRIVER_ETH0_BOOTP

        // Perform a complete initialization, using BOOTP/DHCP

        eth0_up = true;

#ifdef CYGHWR_NET_DRIVER_ETH0_DHCP

        eth0_dhcpstate = 0; // Says that initialization is external to dhcp

        if (do_dhcp(eth0_name, &eth0_bootp_data, &eth0_dhcpstate, &eth0_lease))

#else

#ifdef CYGPKG_NET_DHCP

        eth0_dhcpstate = DHCPSTATE_BOOTP_FALLBACK;

        // so the dhcp machine does no harm if called

#endif

        if (do_bootp(eth0_name, &eth0_bootp_data))

#endif

        {

#ifdef CYGHWR_NET_DRIVER_ETH0_BOOTP_SHOW

            show_bootp(eth0_name, &eth0_bootp_data);

#endif

        } else {

            diag_printf("BOOTP/DHCP failed on eth0\n");

            eth0_up = false;

        }

#elif defined(CYGHWR_NET_DRIVER_ETH0_ADDRS_IP)

        eth0_up = true;

        build_bootp_record(&eth0_bootp_data,

                           eth0_name,

                           string(CYGHWR_NET_DRIVER_ETH0_ADDRS_IP),

                           string(CYGHWR_NET_DRIVER_ETH0_ADDRS_NETMASK),

                           string(CYGHWR_NET_DRIVER_ETH0_ADDRS_BROADCAST),

                           string(CYGHWR_NET_DRIVER_ETH0_ADDRS_GATEWAY),

                           string(CYGHWR_NET_DRIVER_ETH0_ADDRS_SERVER));

        show_bootp(eth0_name, &eth0_bootp_data);

#endif

#ifdef CYGPKG_IO_PCMCIA

    bail_eth0:

#endif

    }

#endif // CYGHWR_NET_DRIVER_ETH0

#ifdef CYGHWR_NET_DRIVER_ETH1

    if ( ! eth1_up ) { // Make this call idempotent

#ifdef CYGPKG_IO_PCMCIA

        if ((t = eth_drv_netdev("eth1")) != (cyg_netdevtab_entry_t *)NULL) {

            int tries = 0;

            while (t->status != CYG_NETDEVTAB_STATUS_AVAIL) {

                if (tries == 0) {

                    diag_printf("... Waiting for PCMCIA device 'eth1'\n");

                }

                if (++tries == 5) {

                    diag_printf("... Giving up on PCMCIA device 'eth1'\n");

                    goto bail_eth1;

                }

                cyg_thread_delay(100);

            }

        }

#endif // CYGPKG_IO_PCMCIA

#ifdef CYGHWR_NET_DRIVER_ETH1_BOOTP

        // Perform a complete initialization, using BOOTP/DHCP

        eth1_up = true;

#ifdef CYGHWR_NET_DRIVER_ETH1_DHCP

        eth1_dhcpstate = 0; // Says that initialization is external to dhcp

        if (do_dhcp(eth1_name, &eth1_bootp_data, &eth1_dhcpstate, &eth1_lease))

#else

#ifdef CYGPKG_NET_DHCP

        eth1_dhcpstate = DHCPSTATE_BOOTP_FALLBACK;

        // so the dhcp machine does no harm if called

#endif

        if (do_bootp(eth1_name, &eth1_bootp_data))

#endif

        {

#ifdef CYGHWR_NET_DRIVER_ETH1_BOOTP_SHOW

            show_bootp(eth1_name, &eth1_bootp_data);

#endif

        } else {

            diag_printf("BOOTP/DHCP failed on eth1\n");

            eth1_up = false;

        }

#elif defined(CYGHWR_NET_DRIVER_ETH1_ADDRS_IP)

        eth1_up = true;

        build_bootp_record(&eth1_bootp_data,

                           eth1_name,

                           string(CYGHWR_NET_DRIVER_ETH1_ADDRS_IP),

                           string(CYGHWR_NET_DRIVER_ETH1_ADDRS_NETMASK),

                           string(CYGHWR_NET_DRIVER_ETH1_ADDRS_BROADCAST),

                           string(CYGHWR_NET_DRIVER_ETH1_ADDRS_GATEWAY),

                           string(CYGHWR_NET_DRIVER_ETH1_ADDRS_SERVER));

        show_bootp(eth1_name, &eth1_bootp_data);

#endif

#ifdef CYGPKG_IO_PCMCIA

    bail_eth1:

#endif

    }

#endif // CYGHWR_NET_DRIVER_ETH1

#ifdef CYGHWR_NET_DRIVER_ETH0

#ifndef CYGHWR_NET_DRIVER_ETH0_MANUAL

    if (eth0_up) {

        if (!init_net(eth0_name, &eth0_bootp_data)) {

            diag_printf("Network initialization failed for eth0\n");

            eth0_up = false;

        }

#ifdef CYGHWR_NET_DRIVER_ETH0_IPV6_PREFIX

        if (!init_net_IPv6(eth0_name, &eth0_bootp_data,

                           string(CYGHWR_NET_DRIVER_ETH0_IPV6_PREFIX))) {

            diag_printf("Static IPv6 network initialization failed for eth0\n");

            eth0_up = false;  // ???

        }

#endif

    }

#endif

#endif

#ifdef CYGHWR_NET_DRIVER_ETH1

#ifndef CYGHWR_NET_DRIVER_ETH1_MANUAL

    if (eth1_up) {

        if (!init_net(eth1_name, &eth1_bootp_data)) {

            diag_printf("Network initialization failed for eth1\n");

            eth1_up = false;

        }

#ifdef CYGHWR_NET_DRIVER_ETH1_IPV6_PREFIX

        if (!init_net_IPv6(eth1_name, &eth1_bootp_data,

                           string(CYGHWR_NET_DRIVER_ETH1_IPV6_PREFIX))) {

            diag_printf("Static IPv6 network initialization failed for eth1\n");

            eth1_up = false; // ???

        }

#endif

    }

#endif

#endif

#ifdef CYGPKG_NET_NLOOP

#if 0 < CYGPKG_NET_NLOOP

    {

        static int loop_init = 0;

        int i;

        if ( 0 == loop_init++ )

            for ( i = 0; i < CYGPKG_NET_NLOOP; i++ )

                init_loopback_interface( i );

    }

#endif

#endif

#ifdef CYGOPT_NET_DHCP_DHCP_THREAD

    dhcp_start_dhcp_mgt_thread();

#endif

#ifdef CYGOPT_NET_IPV6_ROUTING_THREAD

    ipv6_start_routing_thread();

#endif

#ifdef CYGDAT_NS_DNS_DEFAULT_SERVER

#define _SERVER string(CYGDAT_NS_DNS_DEFAULT_SERVER)

    {

      struct in_addr server;

      inet_aton(_SERVER, &server);

      cyg_dns_res_init(&server);

    }

#endif

#ifdef CYGDAT_NS_DNS_DOMAINNAME_NAME

#define _NAME string(CYGDAT_NS_DNS_DOMAINNAME_NAME)

    {

      const char buf[] = _NAME;

      int len = strlen(_NAME);

      setdomainname(buf,len);

    }

#endif

    // Open the monitor to other threads.

    in_init_all_network_interfaces = 0;

}

// EOF network_support.c